Confidence:StrongSolidPlausibleTentativeSpeculative

• Immortal Coil

  2BB

  ArtifactB

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Likeness Looter

  UB

  Creature — Faerie ShapeshifterBU

  Graveyard copier: one card stocks the graveyard (mill, surveil, dredge) and the other can repeatedly become a copy of a card that's there, borrowing its abilities without recasting it — the Shifting Woodland + Aftermath Analyst shape.
• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Chandra, Flameshaper

  5RR

  Legendary Planeswalker — ChandraR

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Professor Dellian Fel

  2BG

  Legendary Planeswalker — DellianBG

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.
• Basri, Tomorrow's Champion

  W

  Legendary Creature — Human KnightW

  Basri, Tomorrow's Champion has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Unearth

  B

  SorceryB

  Unearth has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Edea, Possessed Sorceress

  2UBR

  Legendary Creature — Human WarlockBRU

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Flame Blitz

  R

  EnchantmentR

  Flame Blitz has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Teferi, Temporal Pilgrim

  3UU

  Legendary Planeswalker — TeferiU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Rinoa, Angel Wing

  2W

  Legendary Creature — Human Rebel WarlockW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Ob Nixilis Reignited

  3BB

  Legendary Planeswalker — NixilisB

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Jolted Awake

  W

  SorceryW

  Jolted Awake has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Nazar, the Velvet Fang

  3B

  Legendary Creature — Vampire WarlockB

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.
• Decree of Annihilation

  8RR

  SorceryR

  Decree of Annihilation has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Niv-Mizzet, Parun

  UUURRR

  Legendary Creature — Dragon WizardRU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Decree of Pain

  6BB

  SorceryB

  Decree of Pain has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Avatar Kyoshi, Earthbender

  5GGG

  Legendary Creature — Human AvatarG

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Nephalia Smuggler

  U

  Creature — Human RogueU

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Soulherder

  1WU

  Creature — SpiritUW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Mirrorhall Mimic // Ghastly Mimicry

  3U

  Creature — Spirit // Enchantment — AuraU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Xu-Ifit, Osteoharmonist

  1BB

  Legendary Creature — Human WizardB

  Recursion engine: one card can reanimate repeatedly (an activated ability), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Neutralize

  1UU

  InstantU

  Neutralize has cycling, and Starving Revenant pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Lich

  BBBB

  EnchantmentB

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.